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Email BoardMary Casey Black Elementary
480 Farmington Drive, Brentwood, CA 94513-5548
Summary
Mary Casey Black Elementary is underperforming.
Reading and math results average to the 53rd percentile among comparable California schools.
Only 45.9% of students met California's reading standard, but it is trending up.
Math is weaker: 39.7% of students met California's math standard, but it is trending up.
Proficiency stats
| Current Reading Proficiency | 45.9% |
| Current Math Proficiency | 39.7% |
| Reading State Rank | 2,182/4,657 (53rd percentile) |
| Math State Rank | 2,210/4,657 (53rd percentile) |
School information
| Student / Teacher Ratio | 21:1 |
| Student enrollment (2024–25) | 680 |
| Low-Income Students | 321 (47.2%) |
| English Learners | 99 (14.6%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 3.8 points from last year and rose 7.7 points over the full period. Math rose 0.6 points from last year and rose 8.3 points over the full period.
•Math +8.3 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
White and Filipino students have the strongest results.
Distribution of Scores by Grade
The share meeting the reading standard ranges from 38.9% to 58.7% across the grades shown. Overall, the school’s reading results rank in the top 47% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 18.4-point reading income gap is narrower than the 19.8-point gap at a typical California K–5 school. It narrowed over the period shown.
•English Learners vs English Native
10.0% of English learners meet the reading standard, compared with 49.1% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
White students have the strongest math results at about 62% proficiency. The other reported groups range from about 6% to 59%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 23.9% to 53.8% across the grades shown. Overall, the school’s math results rank in the top 48% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 32.1-point math income gap is wider than the 20.0-point gap at a typical California K–5 school. It widened over the period shown.
•English Learners vs English Native
6.1% of English learners meet the math standard, compared with 46.3% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 1,832 schools for reading and 1,839 for math. The comparison uses 2026 California K–5 schools with at least 20 tested students in each income group and a reported low-income student population. Each school counts once. Its gap is non-low-income proficiency minus low-income proficiency, including negative gaps. California state test data
Understanding this school
How does Mary Casey Black Elementary compare within the district?
Mary Casey Black Elementary is No. 8 in reading and No. 7 in math proficiency among the 9 K–5 schools in Brentwood Union with 2026 results.
Explore the district’s schoolsHow does Mary Casey Black Elementary rank in California?
Mary Casey Black Elementary ranks No. 2,182 of 4,657 in reading and No. 2,210 of 4,657 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How do low-income students at Mary Casey Black Elementary compare within the district?
Low-income students here rank No. 8 in reading and No. 9 in math among 9 K–5 district schools with reportable 2026 results for this group. 36.5% meet the reading standard and 23.6% meet the math standard.
See results by student groupHow does Mary Casey Black Elementary compare with other schools in Brentwood?
Mary Casey Black Elementary is No. 8 in reading and No. 7 in math proficiency among the 9 K–5 schools in Brentwood with 2026 results.
Explore schools in BrentwoodHow does Mary Casey Black Elementary compare with other schools in Contra Costa County?
Mary Casey Black Elementary is No. 64 in both reading and math proficiency among the 113 K–5 schools in Contra Costa County with 2026 results.
Explore schools in Contra Costa CountyWhich schools should I compare?
Schools serving K–5 in the same district.
| School | Math | Reading |
|---|---|---|
| Mary Casey Black ElementaryThis school | 39.7% | 45.9% |
| Brentwood Elementary | 50.1% | 50.1% |
| Garin Elementary | 42.0% | 55.0% |
